Which of the following represents electronic configuration of alkali metals.

Options

A. `(n-1)s^(2)p^(6)ns^(1)`
B. `(n-2)s^(2)p^(6)d^(10)ns^(1)`
C. `(n-1)s^(2)p^(6)np^(1)`
D. `(n-1)s^(2)p^(6)d^(10)ns^(2)`

Answer

A

Explanation

The general electronic configuration of alkali metals is `(n-1)s^(2)p^(6)ns^(1)`